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在沟道内如单坝能实现相对稳定,则坝系也可实现相对稳定,而坝系相对稳定并不是指每个单坝都有可能和必要全部达到相对稳定.坝系相对稳定的最大设计单元控制在面积30—50km~2的小流域内比较符合实际.坝系建设与坡面治理之间有着密不可分的联系,坡面治理具有减洪滞洪作用,可使坝系达到相对稳定所需的坝库数量及单坝高度相应缩减,从而减少坝系工程规模,缩短坝系相对稳定的形成时间,提高坝地的利用率和保收率.目前所采用的坝系相对稳定系数(淤地面积与坝控制面积之比)反映了流域坡面产流产沙与坝系滞洪拦沙之间的平衡关系,但有一定局限性,应以此系数为中心建立一套能全面描述坝系相对稳定状态的指标体系.
In a channel such as a single dam can achieve relative stability, the dam system can also be relatively stable, and dam system is relatively stable does not mean that each single dam are possible and necessary to achieve all the relative stability dam system is relatively stable maximum design unit Control in the small watershed of 30-50km ~ 2 is more in line with the actual situation.Dam line construction and slope control are inextricably linked, slope control has the role of flood reduction and detention, dam can reach a relatively stable The number of dams and the height of single dam are correspondingly reduced, so as to reduce the scale of dam system, shorten the relatively stable formation time of dams and improve the utilization ratio and recovery rate of dams. At present, the relative stability coefficient of dam system And dam control area ratio) reflect the balance between runoff and sediment yield and sediment retention in the dam slope, but there are some limitations, should be based on this coefficient to establish a set can fully describe the dam system is relatively stable state The index system.